*{
    margin:0;
    padding:0;
    box-sizing: border-box;;
}
body{
    font-family: "微软雅黑";
}
.container{
    width:870px;
    margin:auto;
}
.container::after{
    content: "";
    display: table;
    clear: both;
}
header{
    background: #61bae6;
}
nav{
    padding-top: 11px;
    padding-bottom: 11px;
}
nav .nav-left,nav .nav-center,nav .nav-right{
    float: left;
    width:33.333333%;
}
nav .nav-left{
    height: 56px;
}
nav .nav-center{
    text-align: center;
}
nav .nav-right{
    text-align: right;
}
nav .nav-right a{
    color: #fff;
    font-size: 12px;
    font-weight: bold;
    text-decoration: none;
}
nav .nav-right a img{
    display: none;
}
/*banner部分的样式*/
.col{
    width:50%;
    float: left;
}
.banner{
    color: #fff;
    margin-bottom: 60px;
}
.banner p{
    font-weight: bold;
}
.banner h1{
    font-weight: 300;
    margin-bottom: 25px;
    font-size: 36px;
}
.banner a{
    background-color: #2996cc;
    padding:15px 53px;
    font-weight: bold;
    text-decoration: none;
    color: #fff;
    font-size: 12px;
    display: inline-block;
    border-radius: 2px;
    transition: .5s;
}
.banner a:hover{
    background-color: #1882b7;
}
.banner img{
    width:100%;
    display: block;
}
/*页面的主体部分*/
main{
    margin-bottom: 60px;
}
main .col{
    width:25%;
    float: left;
    text-align: center;
    padding-left: 10px;
    padding-right: 10px;
}
main img {
    margin-bottom: 10px;
}
main h3{
    font-size: 14px;
    margin-bottom: 10px;
}
main p{
    font-size: 14px;
    color: #657082;
}
/*首页的下载部分*/
.download{
    border-top: 1px solid #e0e0e0;
    text-align: center;
    margin-top:65px;
    margin-bottom:65px;
    padding-top:65px;
}
.download h2{
    margin-bottom:20px;
}
.download p{
    margin-bottom:35px;
}
.download a{
    display: inline-block;
}
.download img{
    margin-bottom:0;
}
/*底部样式*/
footer{
    background-color: #1b2126;
    color: #6a777d;
    padding-top:60px;
    padding-bottom:60px;
}
/*响应式的代码*/
@media (max-width: 600px) {
    .container{
        width:80%;
    }
    /*登录按钮的响应式*/
    .nav-right span{
        display: none;
    }
    nav .nav-right a img{
        display: inline-block;
        margin-right:39px;
    }
    /*banner部分的样式*/
    .banner .col{
        width:100%;
        text-align: center;
    }
    .banner a{
        margin-bottom:30px;
    }
    .banner img{
        width:80%;
    }
    /*主体部分*/
    main .col{
        width:100%;
        margin-bottom:20px;
    }


}













